1 files changed, 60 insertions, 0 deletions
diff --git a/vu_common.h b/vu_common.h
new file mode 100644
index 0000000..901d972
--- /dev/null
+++ b/vu_common.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright Red Hat
+ * Author: Laurent Vivier <lvivier@redhat.com>
+ *
+ * vhost-user common UDP and TCP functions
+ */
+
+#ifndef VU_COMMON_H
+#define VU_COMMON_H
+#include <linux/virtio_net.h>
+
+static inline void *vu_eth(void *base)
+{
+	return ((char *)base + sizeof(struct virtio_net_hdr_mrg_rxbuf));
+}
+
+static inline void *vu_ip(void *base)
+{
+	return (struct ethhdr *)vu_eth(base) + 1;
+}
+
+static inline void *vu_payloadv4(void *base)
+{
+	return (struct iphdr *)vu_ip(base) + 1;
+}
+
+static inline void *vu_payloadv6(void *base)
+{
+	return (struct ipv6hdr *)vu_ip(base) + 1;
+}
+
+/**
+ * vu_set_element() - Initialize a vu_virtq_element
+ * @elem:	Element to initialize
+ * @out_sg:	One out iovec entry to set in elem
+ * @in_sg:	One in iovec entry to set in elem
+ */
+static inline void vu_set_element(struct vu_virtq_element *elem,
+				  struct iovec *out_sg, struct iovec *in_sg)
+{
+	elem->out_num = !!out_sg;
+	elem->out_sg = out_sg;
+	elem->in_num = !!in_sg;
+	elem->in_sg = in_sg;
+}
+
+void vu_init_elem(struct vu_virtq_element *elem, struct iovec *iov,
+		  int elem_cnt);
+int vu_collect(struct vu_dev *vdev, struct vu_virtq *vq,
+	       struct vu_virtq_element *elem, int max_elem, size_t size,
+	       size_t *frame_size);
+void vu_set_vnethdr(const struct vu_dev *vdev,
+		    struct virtio_net_hdr_mrg_rxbuf *vnethdr,
+                    int num_buffers);
+void vu_flush(const struct vu_dev *vdev, struct vu_virtq *vq,
+	      struct vu_virtq_element *elem, int elem_cnt);
+void vu_kick_cb(struct vu_dev *vdev, union epoll_ref ref,
+		const struct timespec *now);
+int vu_send_single(const struct ctx *c, const void *buf, size_t size);
+#endif /* VU_COMMON_H */